Headphones or headset? Headphones are stereo and made for music. Headsets are mono and made for phone. All I have is headsets.
I have a Motorola HS850, their top of the line, that does OK. It does have some echo and a little distortion. So, I have ordered a Jabra 250V which I'm sure is 100% better.The Jabra has an earbud so sound is funneled directly into the ear. The Motorola just sits against the ear so the sound needs to be turned up leading to distortion and echo. The Motorola also fits loosely. I think most people who have tried both would go with the Jabra. I will get the Jabra in a day or so and may update this. But from everything I hear (no pun intended) I'd say go with the Jabra 250V, on Ebay for about $40. Make sure it's the V model that has vibrate for calls.
Also, don't rely on "Professional" reviews for these things. Those don't mean squat. Check out the User reviews instead.
Epinion Headsets
Cnet Bluetooth Headsets